126215644 has 12 divisors (see below), whose sum is σ = 222098968. Its totient is φ = 62758800.

The previous prime is 126215591. The next prime is 126215647. The reversal of 126215644 is 446512621.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126215647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86442 + ... + 87889.

Almost surely, 2^126215644 is an apocalyptic number.

It is an amenable number.

126215644 is a deficient number, since it is larger than the sum of its proper divisors (95883324).

126215644 is a wasteful number, since it uses less digits than its factorization.

126215644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174516 (or 174514 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 126215644 is about 11234.5736011653. The cubic root of 126215644 is about 501.6156325069.

The spelling of 126215644 in words is "one hundred twenty-six million, two hundred fifteen thousand, six hundred forty-four".